All system.swap.size[n] reporting "0"

[CeeEss]

Hi

I have a virtual server that reports all swap params as zero. Has anyone else seen this?

agent.version : 1.8.10 ## no time to fully upgrade to 2.x

system.uname : Linux abcdefg 3.1.9-vs2.3.2.5 #1 SMP Thu Jan 26 02:37:05 UTC 2012 x86_64 GNU/Linux
The OS is basically patched-up Debian 6.0.4

system.swap.size[,free] : 0
system.swap.size[,pfree] : 0.000000
system.swap.size[,total] : 0
system.swap.size[,used] : 0

tia!

[CeeEss]

Update: installed zabbix_agentd v2.0.4. Still does not report swap values:

> zabbix_get -s www.domain.com -k"system.swap.size[,total]"
0
> zabbix_get -s www.domain.com -k"system.swap.size[,free]"
0